Question

根据这篇文章的提问： Unable to display printer options with AirPrint

我遇到的问题很少：

1）其中一个答案是将Controller.printItem设置为URL。同样，我可以设置多个网址吗？基本上，我有一组我需要一次打印的URL。是否可以将controller.printitems设置为一个URL数组？另外，我知道controller.printItem采用类型'数据'，那么如何将基于Web的图像URL转换为类型'数据'？

2）由于一些奇怪的原因，默认情况下，每次到达打印对话框时，双面都会设置为打开。我需要设置的变量是什么？如果我不能向用户显示选项，那就太好了。

Answer 1

尝试此代码可能会对您有所帮助

- (IBAction)btnPrintTapped:(id)sender {
    NSData *imageData = UIImagePNGRepresentation(self.imgV.image);
    [self printItem:imageData];
}

#pragma mark - Printing 

-(void)printItem :(NSData*)data {
    printController = [UIPrintInteractionController sharedPrintController];
    if(printController && [UIPrintInteractionController canPrintData:data]) {
        printController.delegate = self;
        UIPrintInfo *printInfo = [UIPrintInfo printInfo];
        printInfo.outputType = UIPrintInfoOutputGeneral;
        printInfo.jobName = [NSString stringWithFormat:@""];
        printInfo.duplex = UIPrintInfoDuplexLongEdge;
        printController.printInfo = printInfo;
        printController.showsPageRange = YES;
        printController.printingItem = data;
        void (^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) = ^(UIPrintInteractionController *printController, BOOL completed, NSError *error) {
            if (!completed && error) {
                //NSLog(@"FAILED! due to error in domain %@ with error code %u", error.domain, error.code);
            }
        };
        [printController presentFromBarButtonItem:self.item animated:YES completionHandler:completionHandler];
    }
}

- (BOOL)presentFromRect:(CGRect)rect inView:(UIView *)view animated:(BOOL)animated completionHandler:(UIPrintInteractionCompletionHandler)completion {
    return YES;
}

- (BOOL)presentFromBarButtonItem:(UIBarButtonItem *)item animated:(BOOL)animated completionHandler:(UIPrintInteractionCompletionHandler)completion {
    return YES;
}

Answer 2

我知道它很晚但如果有人需要这可能有帮助：创建URL数组并将其分配给＆＃34; printingItems＆＃34; ＆＃34; UIPrintInteractionController＆＃34;类。

iOS AirPrint - 打印多个URL

2 个答案: